package com.wei.lolbox.utils;

import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.telephony.TelephonyManager;

/**
 * 作者：赵若位
 * 时间：2017/12/1
 * 邮箱：1070138445@qq.com
 * 功能：
 */

public class NetUtils
{

    //获取当前网络连接的类型
    public static String getNetType(Context mContext)
    {
        String strNetworkType = "";
        ConnectivityManager mManager = (ConnectivityManager) mContext.getApplicationContext().getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo networkInfo = mManager.getActiveNetworkInfo();

        if (networkInfo != null && networkInfo.isConnected())
        {
            if (networkInfo.getType() == ConnectivityManager.TYPE_WIFI)
            {
                strNetworkType = "WIFI";
            } else if (networkInfo.getType() == ConnectivityManager.TYPE_MOBILE)
            {
                String _strSubTypeName = networkInfo.getSubtypeName();

                // TD-SCDMA   networkType is 17
                int networkType = networkInfo.getSubtype();
                switch (networkType)
                {
                    case TelephonyManager.NETWORK_TYPE_GPRS:
                    case TelephonyManager.NETWORK_TYPE_EDGE:
                    case TelephonyManager.NETWORK_TYPE_CDMA:
                    case TelephonyManager.NETWORK_TYPE_1xRTT:
                    case TelephonyManager.NETWORK_TYPE_IDEN: //api<8 : replace by 11
                        strNetworkType = "2G";
                        break;
                    case TelephonyManager.NETWORK_TYPE_UMTS:
                    case TelephonyManager.NETWORK_TYPE_EVDO_0:
                    case TelephonyManager.NETWORK_TYPE_EVDO_A:
                    case TelephonyManager.NETWORK_TYPE_HSDPA:
                    case TelephonyManager.NETWORK_TYPE_HSUPA:
                    case TelephonyManager.NETWORK_TYPE_HSPA:
                    case TelephonyManager.NETWORK_TYPE_EVDO_B: //api<9 : replace by 14
                    case TelephonyManager.NETWORK_TYPE_EHRPD:  //api<11 : replace by 12
                    case TelephonyManager.NETWORK_TYPE_HSPAP:  //api<13 : replace by 15
                        strNetworkType = "3G";
                        break;
                    case TelephonyManager.NETWORK_TYPE_LTE:    //api<11 : replace by 13
                        strNetworkType = "4G";
                        break;
                    default:
                        // http://baike.baidu.com/item/TD-SCDMA 中国移动 联通 电信 三种3G制式
                        if (_strSubTypeName.equalsIgnoreCase("TD-SCDMA") || _strSubTypeName.equalsIgnoreCase("WCDMA") || _strSubTypeName.equalsIgnoreCase("CDMA2000"))
                        {
                            strNetworkType = "3G";
                        } else
                        {
                            strNetworkType = _strSubTypeName;
                        }

                        break;
                }

            }
        }
        return strNetworkType;
    }


    //获取当前网络是否已经链接
    public static boolean isNetConnected(Context context)
    {
        if (context != null)
        {
            ConnectivityManager mConnectivityManager = (ConnectivityManager) context.getApplicationContext()
                    .getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
            if (mNetworkInfo != null)
            {
                return mNetworkInfo.isAvailable();
            }
        }
        return false;
    }
}
